Drum-switch with maximum cut-off.



M..VOGELSANG.

DRUM SWITCH WITH MAXIMUM CUT-OUT.

APPLICATION 'HLED DEC. 3.1914.

,Patented Oct. 5, 1915.

UNITED Slh iiil MAX veennsiine, on FER-ANKFORT-0E-THE M on VUIG-T & 'nennrn'nn eoeisn seei i GERMANY.

AIN, GERMANY, AS 'GIATDR "ill"; I

Application filed December 3, 1914. Serial H70. @5135.

To all whom it may concern.

Be it known that 1, MAX VoennsAno, a subject of the German Emperor, and u resident of Frankfort-on-the-Main, Germany, have invented certain new and useful improvements in Druin-Switcnes with Maximum Cut-Outs, of which the it'ollowing is e specification.

My invention relates to improvements in drunr switches with maximum cut-outs, and the object of the improvements is to provide a switch of thiscless which is simple in construction.

lVith this object in view my invention consists in connecting the regnlating'levcr of the switch. with the switch druni through a pawl and ratchet mechanism which is adopted to be thrown out of coupling position by means oi a. maximum relay. When the pnwls are thus released, the switch drum which is connected withthe regulating lever by a spring is thrown into zero position. Constructions of this kind are objectionable, because the operator must take up the pull of the spring which is connected at one end to the drum and ut the opposite end to the regulating lever. 'iher'ettore in my irnproved ep mratus lockingmeans are provided which are controlled by the pawl and ratchet mechanism and lock the regulating lever in its positions, and the regulating lever is'released at the end of the switching operation, so that it can he returned by the operator into zero position in which. the pawls are again in engagement therewith. By thesaid retu movement the spring is simultaneously put under tension.

F or the purpose of explaining the inven-- tion an example embodying the same has been shown in the accompanying drawing, in which the same letters of reference have been used in all the views to indicate correspending parts.

Got, 5,

the regulating lever has been released and. returned into initial position, and in which the spring acting on the switch dru again been put under tension,

Referring to the example illustrated in the drawing, the switch consists of a drum a which is adapted to be operated by a reguleting lever Z. To the drum. a an arm c'is secured which carries pin (5. The letter is adapted to he engaged by a pawl f which is mounted on the regulating lever Z) or en rin connected il'ierewith, and is held, in its position by :1 second pawl which. is made integral with an arm it adapted acted. upon by s inuriinuun relay Bet veen. the arms 0 and (a a spring is interposed which tends to return the drum 0; into initial position. FIHhhQIHXOl'Q the pawl g is providcd with an ernii which is adapted. to engage in the teeth are shaped locking nienihcr m secured to the casing oi the switch. drum.

ln i l have shown the parts in pool tions which correspond the ordinary oporation and with the regulating" lever in the position V. 11" the maximum current is adinitted with tho parts the switch arriving in this position, the maximum rel'iy sttracts its core which is thereby thrown uinst the s'rni of the pawl g, so that the or release tlielocs 1g pawl and the Din (17. Th elig lhe switch drum is releuscd and it roe-h v the spl ng it into the go i e e current is S\ itc l tie arm 7, is hirer?" into engagement n me one of the teeth oi? hie locking iuen'zher m, so that the regulating b can not follow-the pull of the spring l: is i owe I'Dufilllllli'il relay is energized o tin l presses against the pool 57. 5 parts in the positions whicu tl To throw the pawl and chet inechsnism into on gagen'lei'it the operator turns the regulating lever into zero position that the pawl gets again into engagement with the pin d. 'iherehy also the spring in is put under tension for the following operation. Now the parts are in positie shown in Fig. 3

i cleiin herein :iI-S my invention:

1. in switch, the combine ion with the contact making and breathing member, the regulating member and means intermediate the contact melting and breaking member and reguleting ineniher tending to retract the the contact making and breaking member into contact breaking position, of means for rigidly connecting said contact making and breaking member and regulating member,

electrically controlled means for throwing said connecting means out of operation, and means operative when disconnecting the regulating member and contact making and breaking member to lock the regulating member in position.

2. In a switch, the combination with the bontact making and breaking member, the regulating member and a spring intermediate the contact making and breaking mem ber andregulating member tending to retract the contact making and breaking memher into contact breaking position, of a pawl 

